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arXiv 2512.06397cond-mat.mtrl-sciphysics.ins-det
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利用中子测量固态电解质与锂金属之间的埋藏界面

Measuring the buried interphase between solid electrolytes and lithium metal using neutrons

Oak Ridge National Laboratory(橡树岭国家实验室);Brookhaven National Laboratory(布鲁克海文国家实验室);Technical University Munich(慕尼黑工业大学);Czech Academy of Sciences(捷克科学院)

Andrew S. Westover, Katie L. Browning, Antonino Cannavo, Ralph Gilles, Jiri Vacik, James F. Browning, Neelima Paul, Giovanni Ceccio, Vasyl Lavrentiev

AI总结:

本文利用中子深度剖面和反射法研究固态电解质与锂金属之间的界面,发现两者均为厚度小于30nm的梯度界面层,并展示了两种技术在不同长度尺度上的互补性。

摘要:

界面是下一代高性能电池的关键,包括固态锂金属电池。在固态电池中,固固电解质电极界面的埋藏性质使得研究变得困难。中子在非破坏性探测这些埋藏固固界面方面有巨大潜力。本文利用中子深度剖面(NDP)和中子反射法(NR)对一个模型锂金属-锂磷氮化物(LiPON)固态电解质系统进行了比较研究。在NDP数据中,界面处未观察到明显的界面层。NR显示电沉积和蒸镀的LiPON-Li界面存在差异,但发现两者均为厚度小于30nm的梯度界面层。对LiPON-Li2O-Li系统的额外模拟显示,NDP在50nm-1mm范围内有出色的分辨率,而NR在0.1-200nm范围内有理想分辨率,但有不同的样品要求。NDP和NR可以为锂金属和固态电解质之间的界面提供互补的理解,涵盖相关长度尺度。

英文摘要:

Interfaces are the key to next generation high energy batteries including solid state Li metal batteries. In solid state batteries, the buried nature of solid solid electrolyte electrode interfaces makes studying them difficult. Neutrons have significant potential to non destructively probe these buried solid solid interfaces. This work presents a comparative study using both neutron depth profiling (NDP) and neutron reflectometry (NR) to study a model lithium metal-lithium phosphorus oxynitride (LiPON) solid electrolyte system. In the NDP data, no distinct interphase is observed at the interface. NR shows a difference between electrodeposited, and vapor deposited LiPON -Li interfaces but finds both are gradient interphases that are less than 30 nm thick. Additional simulations of the LiPON-Li2O-Li system demonstrate that NDP has an excellent resolution in the 50 nm-1 mm regime while NR has an ideal resolution from 0.1 - 200 nm with different sample requirements. Together NDP and NR can provide a complementary understanding of interfaces between Li metal and solid electrolytes across relevant length scales.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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